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Title: Carbon-encapsulated niobium carbonitride with high volumetric capacitance and wide potential windows in aqueous pseudocapacitors

Abstract

Electrochemical capacitors deliver high power and have long operational lives; yet, their energy densities are limited. Compared to carbon-based electrical double-layer capacitors, pseudocapacitors with an aqueous electrolyte are predicated to provide both high gravimetric and volumetric capacitance while being cost-effective and eco-friendly. However, their narrow operational potential windows limit the practical delivery of energy. In this study, we synthesized novel NbCxN1-x nanoparticles encapsulated in a uniform carbon layer. This pseudocapacitive material exhibits a high volumetric capacitance, a wide potential window stability (~345 F cm –3, 2.1 V, in 1 M of Li 2SO 4), and a long cycling life (>10 000 cycles). Moreover, the symmetric cells (2.2 V, in 1 M of Li 2SO 4) exhibit high energy density as well as excellent cyclability and rate performances. These results offer new chances for the design of aqueous energy storage devices having a wide applied potential difference and excellent performance.

Authors:
 [1];  [1];  [2];  [3];  [4];  [4];  [5];  [3];  [1];  [3]; ORCiD logo [6];  [6]
  1. Shanghai Univ. (China)
  2. National Engineering Research Center for Nanotechnology, Shanghai (China)
  3. Xiamen Univ. (China)
  4. Shanghai Synchrotron Radiation Facility (China)
  5. Shanghai Univ. (China); National Engineering Research Center for Nanotechnology, Shanghai (China)
  6. Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; National Natural Science Foundation of China (NNSFC); USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1579494
Alternate Identifier(s):
OSTI ID: 1691864
Report Number(s):
BNL-212403-2019-JAAM
Journal ID: ISSN 0013-4686
Grant/Contract Number:  
SC0012704
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Electrochimica Acta
Additional Journal Information:
Journal Volume: 325; Journal Issue: C; Journal ID: ISSN 0013-4686
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Niobium carbonitride; Volumetric capacitance; Wide potential windows; Aqueous supercapacitors

Citation Formats

Yan, Hao, Chen, Sheng, Zhang, Daoming, Wang, Zhiqiang, Ma, Jingyuan, Wen, Wen, Wang, Yakun, Wang, Hui-Qiong, Dai, Yang, Zheng, Jin-Cheng, Wu, Lijun, and Zhu, Yimei. Carbon-encapsulated niobium carbonitride with high volumetric capacitance and wide potential windows in aqueous pseudocapacitors. United States: N. p., 2019. Web. doi:10.1016/j.electacta.2019.134935.
Yan, Hao, Chen, Sheng, Zhang, Daoming, Wang, Zhiqiang, Ma, Jingyuan, Wen, Wen, Wang, Yakun, Wang, Hui-Qiong, Dai, Yang, Zheng, Jin-Cheng, Wu, Lijun, & Zhu, Yimei. Carbon-encapsulated niobium carbonitride with high volumetric capacitance and wide potential windows in aqueous pseudocapacitors. United States. doi:10.1016/j.electacta.2019.134935.
Yan, Hao, Chen, Sheng, Zhang, Daoming, Wang, Zhiqiang, Ma, Jingyuan, Wen, Wen, Wang, Yakun, Wang, Hui-Qiong, Dai, Yang, Zheng, Jin-Cheng, Wu, Lijun, and Zhu, Yimei. Tue . "Carbon-encapsulated niobium carbonitride with high volumetric capacitance and wide potential windows in aqueous pseudocapacitors". United States. doi:10.1016/j.electacta.2019.134935. https://www.osti.gov/servlets/purl/1579494.
@article{osti_1579494,
title = {Carbon-encapsulated niobium carbonitride with high volumetric capacitance and wide potential windows in aqueous pseudocapacitors},
author = {Yan, Hao and Chen, Sheng and Zhang, Daoming and Wang, Zhiqiang and Ma, Jingyuan and Wen, Wen and Wang, Yakun and Wang, Hui-Qiong and Dai, Yang and Zheng, Jin-Cheng and Wu, Lijun and Zhu, Yimei},
abstractNote = {Electrochemical capacitors deliver high power and have long operational lives; yet, their energy densities are limited. Compared to carbon-based electrical double-layer capacitors, pseudocapacitors with an aqueous electrolyte are predicated to provide both high gravimetric and volumetric capacitance while being cost-effective and eco-friendly. However, their narrow operational potential windows limit the practical delivery of energy. In this study, we synthesized novel NbCxN1-x nanoparticles encapsulated in a uniform carbon layer. This pseudocapacitive material exhibits a high volumetric capacitance, a wide potential window stability (~345 F cm–3, 2.1 V, in 1 M of Li2SO4), and a long cycling life (>10 000 cycles). Moreover, the symmetric cells (2.2 V, in 1 M of Li2SO4) exhibit high energy density as well as excellent cyclability and rate performances. These results offer new chances for the design of aqueous energy storage devices having a wide applied potential difference and excellent performance.},
doi = {10.1016/j.electacta.2019.134935},
journal = {Electrochimica Acta},
issn = {0013-4686},
number = C,
volume = 325,
place = {United States},
year = {2019},
month = {9}
}

Journal Article:
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